Sand-cutting machine



Sept. 2, 1924. H 1,507,341

E. E. DAVIS SAND CUTTING MACHiNE Filed JuLv 1'7, 1923 I Q I f4 MEI? DH V/J,

A TTORNEYS.

Patented Sept. 2, 1924.

.VUNITED STATES,

1,507,341 PATENT OFFICE.

ELMER E. DAVIS, OF MUNCIE, INDIANA.

SAND-CUTTING MACHINE.

' Application filedJuly 17, ms. Serial No. 652,054.

To all "whom it may concern:

Be it known that I, ELMER E. DAVIS, a citizen of the'United States, and a resident of Muncie, county of Delaware,-and State of Indiana, have invented certain new and useful Sand-Cutting Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts. m

This invention relates to a sand cutting machine of the general character disclosed in the copending 1 application, Serial No.

517,735, filed November 25, 1921.

The chief object of this invention is to improve the construction of a machine so that it will separate cores, reenforcing wires, vent stems and the like from the sand utilized in molding and retain the same until such time as it is desired to remove them from the machine.

The chief feature of the invention consists in the accomplishment of the foregoing object.

Another feature of the invention is the provision of means associated with the trap which permits the cores, reenforcing wires, vent stems and the like to be removed from the trap.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings Fig. 1 is a side elevational view of the sand cutting machine, including the invention. Fig. 2 is an enlarged longitudinal sectional View of the invention. Fig. 3 is an end view of the invention taken along the line 33 of Fig. 2 and in the direction of the arrows. Fig. 4 is a transverse sectional View taken along the line H of Fig. 2 and in the direction of the arrows.

In the drawings there is illustrated a ma- L5 chine of the general character described in the copending application referred to.

Herein such a machine consists of a framework 10 which supports a chute 11 supplied by a conveyor or elevator construction 12, 0 operated by a motor 13 carried by the frame 10. Journaled in the inclined bearings 14 and 15, the latter being the lower bearing,

is a shaft 16, which upon one end carries a bevel pinion 17 meshing with the bevel gear 5 18 driven by the motor 13.

The shaft 16 carries a pair of hubs 19 and 20, which support the spiders 21 and 22 re spectively. The spiders include the circular bands'23. and 24 respectively, and these it is secured to and supported by the bandv 23. Supported by the bafiie 27 is a cylindri-- cal shell 30 which is perforated as at 31.

The other or free end of the shell is closed by a circular plate 32, which plate 32 has an opening 33 therein. The opening 33 is closed by a closure or door 34 hingedly supported at 35 and latched as at 36.

The operation is as follows: The molding sand including the cores, reenforcing wires, vent stems and the like is taken from the pile by the elevator construction 12 and discharged thereby into the chute 11, which in turn discharges into the open mouth of the riddle 25. The riddle 25 is rotated through the shaft 16, and to prevent longitudinal movement of the shaft, a collar 37 is secured thereto, which bears upon the lower bearing 15. Rotation of the riddle 25 carries with it the trap construction which forms the closed lower end of said riddle. In the rotation of said riddle, the molding sand is screened and is discharged beneath the riddle, the larger particles working their way toward the band 23. These particles, and chiefly the cores, reenforcing wires, vent stems and the like in the rotation of said riddle work their way upwardly adjacent the plate 27 and pass said baffle through the opening 28 and discharge into the trap formed by the end plate 32 and the cylinder 30. The loose sand carried by said cores, reenforcing wires, vent stems and the like in the continued rotation of the riddle discharges through the apertures 31 and is again utilized. The machine is operated until either the trap becomes filled with cores, reenforcing wires, vent stems and the-like, or until all of the molding sand has been worked open. Then the machine is stopped, the door 34 opened, and said cores, reenforcing wires, vent stems and the like re- Also supported by the moved from the trap. This construction not only separates the relatively heavy 7, cores, reenforcing wires, Vent stems and the" like from the sand, but also removes the same from the riddle, which is of mesh,

construction and is less ada ted to continuously support a heavy re vo vingload than the shell 30. Thus, there is less opportunity for thebreaking of the riddle and the lifethereof is thereby increased.

The invention claimed is: 1. In a sanding machine for foundries and the like, the combination of an inclined shaft, a spider supported thereby, a peripherally perforated shell concentric with the end by shaft and supported at its upper the spider, means closing the lower end of said shell, a cylindrical screen supported at its lower end by said spider communicatin withsaidshell, whereby the screen is close by said shell and shell closure, and a peripheral'bafflebetween said shell and said screen and supported by said spider.

2. In a sanding mac 1 me for foundries and the like, the combination of an inclined shaft, a spider sup orted thereby, a peripli, 's iell concentric with the erally perforated shaft, means closing the lower end of said shell, a cylindr al screen-supported by said spider and associated with said shell, whereby, he screen is closed by said shell and shell closure, and normally closed means for permitting access to said shell. 3. In a sanding machine for foundries and the like, the combination of an inclinedshaft, a spider supported thereby, a periph Q.

shaft, means closing the lower end of said shell, a cylindricalscreen supported by said spider and associated with saidshell, where- \bythe screen is closed'by said shell and" ELMEB. E; DAVIS.

erally perforated shell concentric with the' 

